हिंदी
तमिलनाडु बोर्ड ऑफ सेकेंडरी एज्युकेशनएचएससी विज्ञान कक्षा १२

Define half life of a reaction. - Chemistry

Advertisements
Advertisements

प्रश्न

Define half life of a reaction.

परिभाषा

उत्तर

Half life of a reaction is defined as the time required for the reactant concentration to reach one half of its initial value.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 7: Chemical Kinetics - Evaluation [पृष्ठ २३०]

APPEARS IN

सामाचीर कलवी Chemistry - Volume 1 and 2 [English] Class 12 TN Board
अध्याय 7 Chemical Kinetics
Evaluation | Q 4. | पृष्ठ २३०

संबंधित प्रश्न

Derive the relation between half life and rate constant for a first order reaction


During nuclear explosion, one of the products is 90Sr with half-life of 28.1 years. If 1μg of 90Sr was absorbed in the bones of a newly born baby instead of calcium, how much of it will remain after 10 years and 60 years if it is not lost metabolically.


The unit of rate constant for zero order reaction is _______.

(A) t–1

(B) mol dm–3 t–1

(C) mol–1 dm3 t–1

(D) mol–2 dm6 t–1


In a first-order reaction A → product, 80% of the given sample of compound decomposes in 40 min. What is the half-life period of the reaction? 


The rate constant for a first order reaction is 1.54 × 10−3 s−1. Calculate its half life time.


A sample of U238 (half-life = 4.5 × 109 years) ore is found to contain 23.8 g of U238 and 20.6 g of Pb206. The age of the ore is ______ × 109 years.


The amount of C-14 isotope in a piece of wood is found to be 1/16th of its amount present in a fresh piece of wood. The age of wood, half-life period of C-14 is 5770 years, is ______ years.


Obtain a relation, `k_2/k_1 = ((t_(1/2))_2)/((t_(1/2))_1)`, where k1 and k2 are rate constants while (t1/2)and  (t1/2)are half-life periods of the first order reaction at temperatures T1 and Trespectively. Write the relation for activation energy.


The unit of rate constant of zero order reaction is ______.


Calculate the half-life of a first order reaction from the rate constant given below:

2 min−1


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×